<template>
  <li @mouseenter="handleMouseEnter" @mouseleave="handleMouseLeave">
    <label>
      <input @change="handleChecked" type="checkbox"/>
      <span>{{todo.name}}</span>
    </label>
    <button class="btn btn-danger" :style="{display: mouseEnter ? 'block' : 'none'}">删除</button>
  </li>
</template>

<script>
import {EventBus} from "@/common/event-bus";

export default {
  name: "Item",
  props: {
    todo: {
      type: Object,
      required: true
    }
  },
  data() {
    return {
      mouseEnter: false
    }
  },
  methods: {
    handleChecked(event) {
      let checked = event.target.checked
      EventBus.$emit("updateTodo", {
        id: this.todo.id,
        done: checked
      })
    },

    handleMouseEnter() {
      this.mouseEnter = true
    },

    handleMouseLeave() {
      this.mouseEnter = false
    }

  }
}
</script>

<style scoped>
li {
  list-style: none;
  height: 36px;
  line-height: 36px;
  padding: 0 5px;
  border-bottom: 1px solid #ddd;
}

li label {
  float: left;
  cursor: pointer;
}

li label li input {
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
  top: -1px;
}

li button {
  float: right;
  display: none;
  margin-top: 3px;
}

li:before {
  content: initial;
}

li:last-child {
  border-bottom: none;
}

.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}


</style>